Hmm, started on a diet (IF, 3 times a week @500-600 kcal) in August.
Lost 10 kg so far (in 16 weeks).

But I still have quite a visible belly fat bulge and the only reason I started the diet was to get rid if that.
I'm now 79 kg and while the loss has slowed a lot (about 1kg a month lately) I will soon reach my "ideal" weight which is 76 kg but the belly is still here!

It takes time for fat to redistribute. But perhaps sit-ups might help?